Develop Reference

Disable level log log4j

I have errorAppender and infoAppender to separate in 2 log files.
That is working, but I need to log in info file only info information.
Example:
when I call logger.error("TEST ERROR"), I don't want this showing on info file.
is there any way to disable level logs?
log4j.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="errorAppender" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="/log/error.log" />
<param name="DatePattern" value="'.'yyyy-MM-dd" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %d %c %M - %m%n" />
</layout>
<param name="Threshold" value="ERROR" />
</appender>
<appender name="infoAppender" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="/log/success.log" />
<param name="DatePattern" value="'.'yyyy-MM-dd" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %d %c %M - %m%n" />
</layout>
<param name="Threshold" value="INFO" />
</appender>
<root>
<appender-ref ref="errorAppender" />
<appender-ref ref="infoAppender" />
</root>
</log4j:configuration>

thanks to #Fildor, it is working now using LevelRangeFilter
<appender name="infoAppender" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="/log/success.log" />
<param name="DatePattern" value="'.'yyyy-MM-dd" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %d %c %M - %m%n" />
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="INFO" />
<param name="LevelMax" value="INFO" />
<param name="AcceptOnMatch" value="true" />
</filter>
<param name="Threshold" value="INFO" />
</appender>

How to separate records in log file by blank line? Log4j

I try to make my log file more readable so I want to separate records in my log file by a blank line after every application run. I use log4j.
I understand that the easiest way is to append %m%n to a single record in code. But I'm interested in doing it via configuration file.
So the question is what I have to add to configuration file log4j.xml?
Here is the context of my log4j.xml configuration file:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
>
<appender name="file" class="org.apache.log4j.RollingFileAppender">
<param name="append" value="true"/>
<param name="maxFileSize" value="10MB"/>
<param name="maxBackupIndex" value="10"/>
<param name="file" value="logs/logs.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n"/>
</layout>
</appender>
<root>
<level value="DEBUG"/>
<appender-ref ref="file"/>
</root>
</log4j:configuration>

You could use another Logger defined in your configuration that uses the same settings except its ConversionPattern which will contain only %n. Here is an example:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true">
<appender name="file" class="org.apache.log4j.RollingFileAppender">
<param name="append" value="true"/>
<param name="maxFileSize" value="10MB"/>
<param name="maxBackupIndex" value="10"/>
<param name="file" value="logs/logs.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n"/>
</layout>
</appender>
<appender name="file2" class="org.apache.log4j.RollingFileAppender">
<param name="append" value="true"/>
<param name="maxFileSize" value="10MB"/>
<param name="maxBackupIndex" value="10"/>
<param name="file" value="logs/logs.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%n"/>
</layout>
</appender>
<logger name="com.company.MyClass">
<level value="DEBUG"/>
<appender-ref ref="file2"/>
</logger>
<root>
<level value="DEBUG"/>
<appender-ref ref="file"/>
</root>
</log4j:configuration>
Then, when your app starts:
Logger logger = Logger.getLogger(com.company.MyClass.class);
logger.info(" ");

I'm not sure to understand what you want to achieve and why, but if you want an empty line between each log entry, you just have to add an extra %n at the end of your ConversionPattern:
<param name="ConversionPattern"
value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n%n"/>
(%n means "new line")

Log4j how to log by level and the log file should contains only its level's log [duplicate]

I am using log4j for logging in my applicaion. I am trying to different level logs in different files but something going wrong. Any help regrading this issue will be highly appreciated.
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %c{1} - %m%n"/>
</layout>
</appender>
<appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="TCS_patch_9/log/retailer_debug.log" />
<param name="Threshold" value="DEBUG" />
<param name="MaxFileSize" value="2MB"/>
<param name="MaxBackupIndex" value="3"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
</layout>
</appender>
<appender name="INFO" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="TCS_patch_9/log/retailer_info.log" />
<param name="Threshold" value="INFO" />
<param name="MaxFileSize" value="2MB"/>
<param name="MaxBackupIndex" value="3"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
</layout>
</appender>
<appender name="ERROR" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="TCS_patch_9/log/retailer_error.log" />
<param name="Threshold" value="ERROR" />
<param name="MaxFileSize" value="2MB"/>
<param name="MaxBackupIndex" value="3"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
</layout>
</appender>
<appender name="FATAL" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="TCS_patch_9/log/retailer_repeat_delay.log" />
<param name="Threshold" value="FATAL" />
<param name="MaxFileSize" value="2MB"/>
<param name="MaxBackupIndex" value="3"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p %c - %m%n"/>
</layout>
</appender>
<root>
<priority value ="error" />
<appender-ref ref="console"/>
<appender-ref ref="DEBUG"/>
<appender-ref ref="INFO"/>
<appender-ref ref="ERROR"/>
<appender-ref ref="FATAL"/>
</root>
</log4j:configuration>

The standard behaviour for log4j appenders is that they log all messages at their threshold level or higher, i.e. an appender with threshold INFO will log INFO, WARN, ERROR and FATAL messages but not DEBUG. If you want to log only INFO messages but not WARN and above then you need to use a LevelMatchFilter.
You will also need to set your root logger priority to DEBUG, otherwise it will only send ERROR and FATAL messages to its appenders and your DEBUG and INFO files will be empty.

Spring Batch: Logs not written in log file in AfterJob Method

I'm facing a problem with the logs when I'm launching the Job on Unix, actually the log file contains all the informations except those that I write in the log in a JobExecutionListener and exactly in the AfterJob Method.
When I'm using Eclipse I can see the report lines in the console.
Here is the configuration of log4j
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="appenderConsole" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-6p [%-25c{1}] %m%n" />
</layout>
</appender>
<appender name="traceDefaultAppender" class="org.apache.log4j.FileAppender">
<param name="file" value="log.tmp"/>
<param name="encoding" value="ISO-8859-1" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-6p [%-25c{1}] %m%n" />
</layout>
</appender>
<appender name="reportDefaultAppender" class="org.apache.log4j.FileAppender">
<param name="file" value="log.tmp"/>
<param name="encoding" value="ISO-8859-1" />
<param name="threshold" value="REPORT#com.cegedimactiv.fwb.core.business.log.LevelReport"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%m%n" />
</layout>
</appender>
<logger name="defaultLogger">
<level value="INFO" />
<appender-ref ref="traceDefaultAppender" />
<appender-ref ref="reportDefaultAppender" />
</logger>
<root>
<level value="INFO"/>
<appender-ref ref="appenderConsole" />
</root>
</log4j:configuration>
Any Idea?

How to get log4j to log my firms classes only

Below is a code of the log4j.xml file we are using at my firm. We been trying to change it to log only output from classes with made that is in org.xxxx. can someone let me know if this can be done and how to do it
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<appender name="logfile" class="org.apache.log4j.FileAppender">
<param name="File" value="logs/disater_relief.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<appender name="rollinglogfile" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="logs/ennrollment.log" />
<param name="immediateFlush" value="true" />
<param name="append" value="true" />
<param name="maxFileSize" value="1MB" />
<param name="maxBackupIndex" value="3" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<appender name="dailyrollinglogfile" class="org.apache.log4j.DailyRollingFileAppender">
<param name="file" value="logs/ennrollment.log" />
<param name="immediateFlush" value="true" />
<param name="append" value="true" />
<param name="datePattern" value=" '.' yyyy-MM-dd "/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<root>
<priority value="debug" />
<appender-ref ref="console" />
<appender-ref ref="dailyrollinglogfile" />
</root>
</log4j:configuration>

Your root looger defines debug logging for all components. You should change it to warn (so you still see warnings) and add an extra logger for your own components:
<logger name="com.xxx.mycomponent">
<level value="trace"/>
<!-- appenders ... -->
</logger>
<root>
<priority value="warn" />
<appender-ref ref="console" />
<appender-ref ref="dailyrollinglogfile" />
</root>

Simply turn off the logging for the package you don't want to see in your logs...
<!-- Limit JBoss categories -->
<category name="org.jboss">
<priority value="OFF"/>
</category>